diff --git a/advanced_expert/vulnerabilities/README.md b/advanced_expert/vulnerabilities/README.md
index 0b4211d..5e663c0 100644
--- a/advanced_expert/vulnerabilities/README.md
+++ b/advanced_expert/vulnerabilities/README.md
@@ -1,5 +1,7 @@
 ## smart contract vulnerabilities
 
+<br>
+
 
 ### tl; dr
 
@@ -18,6 +20,7 @@
 
 ### in this dir
 
+<br>
 
 * **[reentrancy](reentrancy_attacks)**
 * **[randomness in ethereum](random_numbers.md)**